/Engine/Source/Runtime/Engine/Classes/Particles/Color/ParticleModuleColor.h
Extended version of spawn, allows for using a random stream for distribution value retrieval
void SpawnEx ( [FParticleEmitterInstance](API\Runtime\Engine\FParticleEmitterInstance) * Owner, int32 Offset, float SpawnTime, struct [FRandomStream](API\Runtime\Core\Math\FRandomStream) * InRandomStream, [FBaseParticle](API\Runtime\Engine\FBaseParticle) * ParticleBase )